Andrew Edward Callow (Captain) was born in England on the Isle of Man, and was working as a veterinary surgeon when he enlisted in Ballarat on 10th June 1917. His civilian vocation saw the 50 year old join the Veterinary Corps with the rank of Captain. Just two weeks later, he sailed from Melbourne with his unit on board the Port Lincoln. He reached Egypt in August where he served for 12 months with the 1st Australian Veterinary Section, followed by stints with the 8th and 9th Mobile Veterinary Sections, Desert Corps Reinforcements, and the 2nd Signals Squadron. In November 1918, he was admitted to hospitall in Alexandria with malaria, an illness which would recur in February and again in March the following year. In April 1919, he returned to Australia on board the Karoa.

His sons Nathaniel and Auburn also served in the AIF and are honoured with trees in the Avenue.